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file_util, vfs: Use std::string_view where applicable 

Avoids unnecessary construction of std::string instances where
applicable.
This commit is contained in:
Lioncash 2018-07-22 01:23:29 -04:00
parent ef163c1a15
commit 398444e676
10 changed files with 209 additions and 132 deletions
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84
src/common/file_util.cpp
View File

@ -802,66 +802,80 @@ void SplitFilename83(const std::string& filename, std::array<char, 9>& short_nam
} }
} }
std::vector<std::string> SplitPathComponents(const std::string& filename) { std::vector<std::string> SplitPathComponents(std::string_view filename) {
auto copy(filename); std::string copy(filename);
std::replace(copy.begin(), copy.end(), '\\', '/'); std::replace(copy.begin(), copy.end(), '\\', '/');
std::vector<std::string> out; std::vector<std::string> out;
std::stringstream stream(filename); std::stringstream stream(copy);
std::string item; std::string item;
while (std::getline(stream, item, '/')) while (std::getline(stream, item, '/')) {
out.push_back(std::move(item)); out.push_back(std::move(item));
}
return out; return out;
} }
std::string GetParentPath(const std::string& path) { std::string_view GetParentPath(std::string_view path) {
auto out = path; const auto name_bck_index = path.rfind('\\');
const auto name_bck_index = out.find_last_of('\\'); const auto name_fwd_index = path.rfind('/');
const auto name_fwd_index = out.find_last_of('/');
size_t name_index; size_t name_index;
if (name_bck_index == std::string::npos || name_fwd_index == std::string::npos)
name_index = std::min<size_t>(name_bck_index, name_fwd_index);
else
name_index = std::max<size_t>(name_bck_index, name_fwd_index);
return out.erase(name_index); if (name_bck_index == std::string_view::npos || name_fwd_index == std::string_view::npos) {
name_index = std::min(name_bck_index, name_fwd_index);
} else {
name_index = std::max(name_bck_index, name_fwd_index);
}
return path.substr(0, name_index);
} }
std::string GetPathWithoutTop(std::string path) { std::string_view GetPathWithoutTop(std::string_view path) {
if (path.empty()) if (path.empty()) {
return ""; return path;
while (path[0] == '\\' || path[0] == '/') {
path = path.substr(1);
if (path.empty())
return "";
} }
const auto name_bck_index = path.find_first_of('\\');
const auto name_fwd_index = path.find_first_of('/'); while (path[0] == '\\' || path[0] == '/') {
path.remove_suffix(1);
if (path.empty()) {
return path;
}
}
const auto name_bck_index = path.find('\\');
const auto name_fwd_index = path.find('/');
return path.substr(std::min(name_bck_index, name_fwd_index) + 1); return path.substr(std::min(name_bck_index, name_fwd_index) + 1);
} }
std::string GetFilename(std::string path) { std::string_view GetFilename(std::string_view path) {
std::replace(path.begin(), path.end(), '\\', '/'); const auto name_index = path.find_last_of("\\/");
auto name_index = path.find_last_of('/');
if (name_index == std::string::npos) if (name_index == std::string_view::npos) {
return ""; return {};
}
return path.substr(name_index + 1); return path.substr(name_index + 1);
} }
std::string GetExtensionFromFilename(const std::string& name) { std::string_view GetExtensionFromFilename(std::string_view name) {
size_t index = name.find_last_of('.'); const size_t index = name.rfind('.');
if (index == std::string::npos)
return ""; if (index == std::string_view::npos) {
return {};
}
return name.substr(index + 1); return name.substr(index + 1);
} }
std::string RemoveTrailingSlash(const std::string& path) { std::string_view RemoveTrailingSlash(std::string_view path) {
if (path.empty()) if (path.empty()) {
return path; return path;
if (path.back() == '\\' || path.back() == '/') }
return path.substr(0, path.size() - 1);
if (path.back() == '\\' || path.back() == '/') {
path.remove_suffix(1);
return path;
}
return path; return path;
} }

13
src/common/file_util.h
View File

@ -9,6 +9,7 @@
#include <fstream> #include <fstream>
#include <functional> #include <functional>
#include <string> #include <string>
#include <string_view>
#include <type_traits> #include <type_traits>
#include <vector> #include <vector>
#include "common/common_types.h" #include "common/common_types.h"
@ -151,22 +152,22 @@ void SplitFilename83(const std::string& filename, std::array<char, 9>& short_nam
// Splits the path on '/' or '\' and put the components into a vector // Splits the path on '/' or '\' and put the components into a vector
// i.e. "C:\Users\Yuzu\Documents\save.bin" becomes {"C:", "Users", "Yuzu", "Documents", "save.bin" } // i.e. "C:\Users\Yuzu\Documents\save.bin" becomes {"C:", "Users", "Yuzu", "Documents", "save.bin" }
std::vector<std::string> SplitPathComponents(const std::string& filename); std::vector<std::string> SplitPathComponents(std::string_view filename);
// Gets all of the text up to the last '/' or '\' in the path. // Gets all of the text up to the last '/' or '\' in the path.
std::string GetParentPath(const std::string& path); std::string_view GetParentPath(std::string_view path);
// Gets all of the text after the first '/' or '\' in the path. // Gets all of the text after the first '/' or '\' in the path.
std::string GetPathWithoutTop(std::string path); std::string_view GetPathWithoutTop(std::string_view path);
// Gets the filename of the path // Gets the filename of the path
std::string GetFilename(std::string path); std::string_view GetFilename(std::string_view path);
// Gets the extension of the filename // Gets the extension of the filename
std::string GetExtensionFromFilename(const std::string& name); std::string_view GetExtensionFromFilename(std::string_view name);
// Removes the final '/' or '\' if one exists // Removes the final '/' or '\' if one exists
std::string RemoveTrailingSlash(const std::string& path); std::string_view RemoveTrailingSlash(std::string_view path);
// Creates a new vector containing indices [first, last) from the original. // Creates a new vector containing indices [first, last) from the original.
template <typename T> template <typename T>

111
src/core/file_sys/vfs.cpp
View File

@ -13,7 +13,7 @@ namespace FileSys {
VfsFile::~VfsFile() = default; VfsFile::~VfsFile() = default;
std::string VfsFile::GetExtension() const { std::string VfsFile::GetExtension() const {
return FileUtil::GetExtensionFromFilename(GetName()); return std::string(FileUtil::GetExtensionFromFilename(GetName()));
} }
VfsDirectory::~VfsDirectory() = default; VfsDirectory::~VfsDirectory() = default;
@ -46,64 +46,80 @@ size_t VfsFile::WriteBytes(const std::vector<u8>& data, size_t offset) {
return Write(data.data(), data.size(), offset); return Write(data.data(), data.size(), offset);
} }
std::shared_ptr<VfsFile> VfsDirectory::GetFileRelative(const std::string& path) const { std::shared_ptr<VfsFile> VfsDirectory::GetFileRelative(std::string_view path) const {
auto vec = FileUtil::SplitPathComponents(path); auto vec = FileUtil::SplitPathComponents(path);
vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }), vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
vec.end()); vec.end());
if (vec.empty()) if (vec.empty()) {
return nullptr; return nullptr;
if (vec.size() == 1) }
if (vec.size() == 1) {
return GetFile(vec[0]); return GetFile(vec[0]);
}
auto dir = GetSubdirectory(vec[0]); auto dir = GetSubdirectory(vec[0]);
for (size_t component = 1; component < vec.size() - 1; ++component) { for (size_t component = 1; component < vec.size() - 1; ++component) {
if (dir == nullptr) if (dir == nullptr) {
return nullptr; return nullptr;
}
dir = dir->GetSubdirectory(vec[component]); dir = dir->GetSubdirectory(vec[component]);
} }
if (dir == nullptr)
if (dir == nullptr) {
return nullptr; return nullptr;
}
return dir->GetFile(vec.back()); return dir->GetFile(vec.back());
} }
std::shared_ptr<VfsFile> VfsDirectory::GetFileAbsolute(const std::string& path) const { std::shared_ptr<VfsFile> VfsDirectory::GetFileAbsolute(std::string_view path) const {
if (IsRoot()) if (IsRoot()) {
return GetFileRelative(path); return GetFileRelative(path);
}
return GetParentDirectory()->GetFileAbsolute(path); return GetParentDirectory()->GetFileAbsolute(path);
} }
std::shared_ptr<VfsDirectory> VfsDirectory::GetDirectoryRelative(const std::string& path) const { std::shared_ptr<VfsDirectory> VfsDirectory::GetDirectoryRelative(std::string_view path) const {
auto vec = FileUtil::SplitPathComponents(path); auto vec = FileUtil::SplitPathComponents(path);
vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }), vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
vec.end()); vec.end());
if (vec.empty()) if (vec.empty()) {
// TODO(DarkLordZach): Return this directory if path is '/' or similar. Can't currently // TODO(DarkLordZach): Return this directory if path is '/' or similar. Can't currently
// because of const-ness // because of const-ness
return nullptr; return nullptr;
}
auto dir = GetSubdirectory(vec[0]); auto dir = GetSubdirectory(vec[0]);
for (size_t component = 1; component < vec.size(); ++component) { for (size_t component = 1; component < vec.size(); ++component) {
if (dir == nullptr) if (dir == nullptr) {
return nullptr; return nullptr;
}
dir = dir->GetSubdirectory(vec[component]); dir = dir->GetSubdirectory(vec[component]);
} }
return dir; return dir;
} }
std::shared_ptr<VfsDirectory> VfsDirectory::GetDirectoryAbsolute(const std::string& path) const { std::shared_ptr<VfsDirectory> VfsDirectory::GetDirectoryAbsolute(std::string_view path) const {
if (IsRoot()) if (IsRoot()) {
return GetDirectoryRelative(path); return GetDirectoryRelative(path);
}
return GetParentDirectory()->GetDirectoryAbsolute(path); return GetParentDirectory()->GetDirectoryAbsolute(path);
} }
std::shared_ptr<VfsFile> VfsDirectory::GetFile(const std::string& name) const { std::shared_ptr<VfsFile> VfsDirectory::GetFile(std::string_view name) const {
const auto& files = GetFiles(); const auto& files = GetFiles();
const auto iter = std::find_if(files.begin(), files.end(), const auto iter = std::find_if(files.begin(), files.end(),
[&name](const auto& file1) { return name == file1->GetName(); }); [&name](const auto& file1) { return name == file1->GetName(); });
return iter == files.end() ? nullptr : *iter; return iter == files.end() ? nullptr : *iter;
} }
std::shared_ptr<VfsDirectory> VfsDirectory::GetSubdirectory(const std::string& name) const { std::shared_ptr<VfsDirectory> VfsDirectory::GetSubdirectory(std::string_view name) const {
const auto& subs = GetSubdirectories(); const auto& subs = GetSubdirectories();
const auto iter = std::find_if(subs.begin(), subs.end(), const auto iter = std::find_if(subs.begin(), subs.end(),
[&name](const auto& file1) { return name == file1->GetName(); }); [&name](const auto& file1) { return name == file1->GetName(); });
@ -128,77 +144,96 @@ size_t VfsDirectory::GetSize() const {
return file_total + subdir_total; return file_total + subdir_total;
} }
std::shared_ptr<VfsFile> VfsDirectory::CreateFileRelative(const std::string& path) { std::shared_ptr<VfsFile> VfsDirectory::CreateFileRelative(std::string_view path) {
auto vec = FileUtil::SplitPathComponents(path); auto vec = FileUtil::SplitPathComponents(path);
vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }), vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
vec.end()); vec.end());
if (vec.empty()) if (vec.empty()) {
return nullptr; return nullptr;
if (vec.size() == 1) }
if (vec.size() == 1) {
return CreateFile(vec[0]); return CreateFile(vec[0]);
}
auto dir = GetSubdirectory(vec[0]); auto dir = GetSubdirectory(vec[0]);
if (dir == nullptr) { if (dir == nullptr) {
dir = CreateSubdirectory(vec[0]); dir = CreateSubdirectory(vec[0]);
if (dir == nullptr) if (dir == nullptr) {
return nullptr; return nullptr;
} }
}
return dir->CreateFileRelative(FileUtil::GetPathWithoutTop(path)); return dir->CreateFileRelative(FileUtil::GetPathWithoutTop(path));
} }
std::shared_ptr<VfsFile> VfsDirectory::CreateFileAbsolute(const std::string& path) { std::shared_ptr<VfsFile> VfsDirectory::CreateFileAbsolute(std::string_view path) {
if (IsRoot()) if (IsRoot()) {
return CreateFileRelative(path); return CreateFileRelative(path);
}
return GetParentDirectory()->CreateFileAbsolute(path); return GetParentDirectory()->CreateFileAbsolute(path);
} }
std::shared_ptr<VfsDirectory> VfsDirectory::CreateDirectoryRelative(const std::string& path) { std::shared_ptr<VfsDirectory> VfsDirectory::CreateDirectoryRelative(std::string_view path) {
auto vec = FileUtil::SplitPathComponents(path); auto vec = FileUtil::SplitPathComponents(path);
vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }), vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
vec.end()); vec.end());
if (vec.empty()) if (vec.empty()) {
return nullptr; return nullptr;
if (vec.size() == 1) }
if (vec.size() == 1) {
return CreateSubdirectory(vec[0]); return CreateSubdirectory(vec[0]);
}
auto dir = GetSubdirectory(vec[0]); auto dir = GetSubdirectory(vec[0]);
if (dir == nullptr) { if (dir == nullptr) {
dir = CreateSubdirectory(vec[0]); dir = CreateSubdirectory(vec[0]);
if (dir == nullptr) if (dir == nullptr) {
return nullptr; return nullptr;
} }
}
return dir->CreateDirectoryRelative(FileUtil::GetPathWithoutTop(path)); return dir->CreateDirectoryRelative(FileUtil::GetPathWithoutTop(path));
} }
std::shared_ptr<VfsDirectory> VfsDirectory::CreateDirectoryAbsolute(const std::string& path) { std::shared_ptr<VfsDirectory> VfsDirectory::CreateDirectoryAbsolute(std::string_view path) {
if (IsRoot()) if (IsRoot()) {
return CreateDirectoryRelative(path); return CreateDirectoryRelative(path);
}
return GetParentDirectory()->CreateDirectoryAbsolute(path); return GetParentDirectory()->CreateDirectoryAbsolute(path);
} }
bool VfsDirectory::DeleteSubdirectoryRecursive(const std::string& name) { bool VfsDirectory::DeleteSubdirectoryRecursive(std::string_view name) {
auto dir = GetSubdirectory(name); auto dir = GetSubdirectory(name);
if (dir == nullptr) if (dir == nullptr) {
return false; return false;
}
bool success = true; bool success = true;
for (const auto& file : dir->GetFiles()) { for (const auto& file : dir->GetFiles()) {
if (!DeleteFile(file->GetName())) if (!DeleteFile(file->GetName())) {
success = false; success = false;
} }
}
for (const auto& sdir : dir->GetSubdirectories()) { for (const auto& sdir : dir->GetSubdirectories()) {
if (!dir->DeleteSubdirectoryRecursive(sdir->GetName())) if (!dir->DeleteSubdirectoryRecursive(sdir->GetName())) {
success = false; success = false;
} }
}
return success; return success;
} }
bool VfsDirectory::Copy(const std::string& src, const std::string& dest) { bool VfsDirectory::Copy(std::string_view src, std::string_view dest) {
const auto f1 = GetFile(src); const auto f1 = GetFile(src);
auto f2 = CreateFile(dest); auto f2 = CreateFile(dest);
if (f1 == nullptr || f2 == nullptr) if (f1 == nullptr || f2 == nullptr) {
return false; return false;
}
if (!f2->Resize(f1->GetSize())) { if (!f2->Resize(f1->GetSize())) {
DeleteFile(dest); DeleteFile(dest);
@ -216,23 +251,23 @@ bool ReadOnlyVfsDirectory::IsReadable() const {
return true; return true;
} }
std::shared_ptr<VfsDirectory> ReadOnlyVfsDirectory::CreateSubdirectory(const std::string& name) { std::shared_ptr<VfsDirectory> ReadOnlyVfsDirectory::CreateSubdirectory(std::string_view name) {
return nullptr; return nullptr;
} }
std::shared_ptr<VfsFile> ReadOnlyVfsDirectory::CreateFile(const std::string& name) { std::shared_ptr<VfsFile> ReadOnlyVfsDirectory::CreateFile(std::string_view name) {
return nullptr; return nullptr;
} }
bool ReadOnlyVfsDirectory::DeleteSubdirectory(const std::string& name) { bool ReadOnlyVfsDirectory::DeleteSubdirectory(std::string_view name) {
return false; return false;
} }
bool ReadOnlyVfsDirectory::DeleteFile(const std::string& name) { bool ReadOnlyVfsDirectory::DeleteFile(std::string_view name) {
return false; return false;
} }
bool ReadOnlyVfsDirectory::Rename(const std::string& name) { bool ReadOnlyVfsDirectory::Rename(std::string_view name) {
return false; return false;
} }
} // namespace FileSys } // namespace FileSys

50
src/core/file_sys/vfs.h
View File

@ -6,11 +6,11 @@
#include <memory> #include <memory>
#include <string> #include <string>
#include <string_view>
#include <type_traits> #include <type_traits>
#include <vector> #include <vector>
#include "boost/optional.hpp" #include "boost/optional.hpp"
#include "common/common_types.h" #include "common/common_types.h"
#include "common/file_util.h"
namespace FileSys { namespace FileSys {
struct VfsFile; struct VfsFile;
@ -112,7 +112,7 @@ struct VfsFile : NonCopyable {
} }
// Renames the file to name. Returns whether or not the operation was successsful. // Renames the file to name. Returns whether or not the operation was successsful.
virtual bool Rename(const std::string& name) = 0; virtual bool Rename(std::string_view name) = 0;
}; };
// A class representing a directory in an abstract filesystem. // A class representing a directory in an abstract filesystem.
@ -121,27 +121,27 @@ struct VfsDirectory : NonCopyable {
// Retrives the file located at path as if the current directory was root. Returns nullptr if // Retrives the file located at path as if the current directory was root. Returns nullptr if
// not found. // not found.
virtual std::shared_ptr<VfsFile> GetFileRelative(const std::string& path) const; virtual std::shared_ptr<VfsFile> GetFileRelative(std::string_view path) const;
// Calls GetFileRelative(path) on the root of the current directory. // Calls GetFileRelative(path) on the root of the current directory.
virtual std::shared_ptr<VfsFile> GetFileAbsolute(const std::string& path) const; virtual std::shared_ptr<VfsFile> GetFileAbsolute(std::string_view path) const;
// Retrives the directory located at path as if the current directory was root. Returns nullptr // Retrives the directory located at path as if the current directory was root. Returns nullptr
// if not found. // if not found.
virtual std::shared_ptr<VfsDirectory> GetDirectoryRelative(const std::string& path) const; virtual std::shared_ptr<VfsDirectory> GetDirectoryRelative(std::string_view path) const;
// Calls GetDirectoryRelative(path) on the root of the current directory. // Calls GetDirectoryRelative(path) on the root of the current directory.
virtual std::shared_ptr<VfsDirectory> GetDirectoryAbsolute(const std::string& path) const; virtual std::shared_ptr<VfsDirectory> GetDirectoryAbsolute(std::string_view path) const;
// Returns a vector containing all of the files in this directory. // Returns a vector containing all of the files in this directory.
virtual std::vector<std::shared_ptr<VfsFile>> GetFiles() const = 0; virtual std::vector<std::shared_ptr<VfsFile>> GetFiles() const = 0;
// Returns the file with filename matching name. Returns nullptr if directory dosen't have a // Returns the file with filename matching name. Returns nullptr if directory dosen't have a
// file with name. // file with name.
virtual std::shared_ptr<VfsFile> GetFile(const std::string& name) const; virtual std::shared_ptr<VfsFile> GetFile(std::string_view name) const;
// Returns a vector containing all of the subdirectories in this directory. // Returns a vector containing all of the subdirectories in this directory.
virtual std::vector<std::shared_ptr<VfsDirectory>> GetSubdirectories() const = 0; virtual std::vector<std::shared_ptr<VfsDirectory>> GetSubdirectories() const = 0;
// Returns the directory with name matching name. Returns nullptr if directory dosen't have a // Returns the directory with name matching name. Returns nullptr if directory dosen't have a
// directory with name. // directory with name.
virtual std::shared_ptr<VfsDirectory> GetSubdirectory(const std::string& name) const; virtual std::shared_ptr<VfsDirectory> GetSubdirectory(std::string_view name) const;
// Returns whether or not the directory can be written to. // Returns whether or not the directory can be written to.
virtual bool IsWritable() const = 0; virtual bool IsWritable() const = 0;
@ -161,49 +161,49 @@ struct VfsDirectory : NonCopyable {
// Creates a new subdirectory with name name. Returns a pointer to the new directory or nullptr // Creates a new subdirectory with name name. Returns a pointer to the new directory or nullptr
// if the operation failed. // if the operation failed.
virtual std::shared_ptr<VfsDirectory> CreateSubdirectory(const std::string& name) = 0; virtual std::shared_ptr<VfsDirectory> CreateSubdirectory(std::string_view name) = 0;
// Creates a new file with name name. Returns a pointer to the new file or nullptr if the // Creates a new file with name name. Returns a pointer to the new file or nullptr if the
// operation failed. // operation failed.
virtual std::shared_ptr<VfsFile> CreateFile(const std::string& name) = 0; virtual std::shared_ptr<VfsFile> CreateFile(std::string_view name) = 0;
// Creates a new file at the path relative to this directory. Also creates directories if // Creates a new file at the path relative to this directory. Also creates directories if
// they do not exist and is supported by this implementation. Returns nullptr on any failure. // they do not exist and is supported by this implementation. Returns nullptr on any failure.
virtual std::shared_ptr<VfsFile> CreateFileRelative(const std::string& path); virtual std::shared_ptr<VfsFile> CreateFileRelative(std::string_view path);
// Creates a new file at the path relative to root of this directory. Also creates directories // Creates a new file at the path relative to root of this directory. Also creates directories
// if they do not exist and is supported by this implementation. Returns nullptr on any failure. // if they do not exist and is supported by this implementation. Returns nullptr on any failure.
virtual std::shared_ptr<VfsFile> CreateFileAbsolute(const std::string& path); virtual std::shared_ptr<VfsFile> CreateFileAbsolute(std::string_view path);
// Creates a new directory at the path relative to this directory. Also creates directories if // Creates a new directory at the path relative to this directory. Also creates directories if
// they do not exist and is supported by this implementation. Returns nullptr on any failure. // they do not exist and is supported by this implementation. Returns nullptr on any failure.
virtual std::shared_ptr<VfsDirectory> CreateDirectoryRelative(const std::string& path); virtual std::shared_ptr<VfsDirectory> CreateDirectoryRelative(std::string_view path);
// Creates a new directory at the path relative to root of this directory. Also creates // Creates a new directory at the path relative to root of this directory. Also creates
// directories if they do not exist and is supported by this implementation. Returns nullptr on // directories if they do not exist and is supported by this implementation. Returns nullptr on
// any failure. // any failure.
virtual std::shared_ptr<VfsDirectory> CreateDirectoryAbsolute(const std::string& path); virtual std::shared_ptr<VfsDirectory> CreateDirectoryAbsolute(std::string_view path);
// Deletes the subdirectory with name and returns true on success. // Deletes the subdirectory with name and returns true on success.
virtual bool DeleteSubdirectory(const std::string& name) = 0; virtual bool DeleteSubdirectory(std::string_view name) = 0;
// Deletes all subdirectories and files of subdirectory with name recirsively and then deletes // Deletes all subdirectories and files of subdirectory with name recirsively and then deletes
// the subdirectory. Returns true on success. // the subdirectory. Returns true on success.
virtual bool DeleteSubdirectoryRecursive(const std::string& name); virtual bool DeleteSubdirectoryRecursive(std::string_view name);
// Returnes whether or not the file with name name was deleted successfully. // Returnes whether or not the file with name name was deleted successfully.
virtual bool DeleteFile(const std::string& name) = 0; virtual bool DeleteFile(std::string_view name) = 0;
// Returns whether or not this directory was renamed to name. // Returns whether or not this directory was renamed to name.
virtual bool Rename(const std::string& name) = 0; virtual bool Rename(std::string_view name) = 0;
// Returns whether or not the file with name src was successfully copied to a new file with name // Returns whether or not the file with name src was successfully copied to a new file with name
// dest. // dest.
virtual bool Copy(const std::string& src, const std::string& dest); virtual bool Copy(std::string_view src, std::string_view dest);
// Interprets the file with name file instead as a directory of type directory. // Interprets the file with name file instead as a directory of type directory.
// The directory must have a constructor that takes a single argument of type // The directory must have a constructor that takes a single argument of type
// std::shared_ptr<VfsFile>. Allows to reinterpret container files (i.e NCA, zip, XCI, etc) as a // std::shared_ptr<VfsFile>. Allows to reinterpret container files (i.e NCA, zip, XCI, etc) as a
// subdirectory in one call. // subdirectory in one call.
template <typename Directory> template <typename Directory>
bool InterpretAsDirectory(const std::string& file) { bool InterpretAsDirectory(std::string_view file) {
auto file_p = GetFile(file); auto file_p = GetFile(file);
if (file_p == nullptr) if (file_p == nullptr)
return false; return false;
@ -221,10 +221,10 @@ protected:
struct ReadOnlyVfsDirectory : public VfsDirectory { struct ReadOnlyVfsDirectory : public VfsDirectory {
bool IsWritable() const override; bool IsWritable() const override;
bool IsReadable() const override; bool IsReadable() const override;
std::shared_ptr<VfsDirectory> CreateSubdirectory(const std::string& name) override; std::shared_ptr<VfsDirectory> CreateSubdirectory(std::string_view name) override;
std::shared_ptr<VfsFile> CreateFile(const std::string& name) override; std::shared_ptr<VfsFile> CreateFile(std::string_view name) override;
bool DeleteSubdirectory(const std::string& name) override; bool DeleteSubdirectory(std::string_view name) override;
bool DeleteFile(const std::string& name) override; bool DeleteFile(std::string_view name) override;
bool Rename(const std::string& name) override; bool Rename(std::string_view name) override;
}; };
} // namespace FileSys } // namespace FileSys

2
src/core/file_sys/vfs_offset.cpp
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@ -80,7 +80,7 @@ size_t OffsetVfsFile::WriteBytes(const std::vector<u8>& data, size_t r_offset) {
return file->Write(data.data(), TrimToFit(data.size(), r_offset), offset + r_offset); return file->Write(data.data(), TrimToFit(data.size(), r_offset), offset + r_offset);
} }
bool OffsetVfsFile::Rename(const std::string& name) { bool OffsetVfsFile::Rename(std::string_view name) {
return file->Rename(name); return file->Rename(name);
} }

5
src/core/file_sys/vfs_offset.h
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@ -4,6 +4,9 @@
#pragma once #pragma once
#include <memory>
#include <string_view>
#include "core/file_sys/vfs.h" #include "core/file_sys/vfs.h"
namespace FileSys { namespace FileSys {
@ -30,7 +33,7 @@ struct OffsetVfsFile : public VfsFile {
bool WriteByte(u8 data, size_t offset) override; bool WriteByte(u8 data, size_t offset) override;
size_t WriteBytes(const std::vector<u8>& data, size_t offset) override; size_t WriteBytes(const std::vector<u8>& data, size_t offset) override;
bool Rename(const std::string& name) override; bool Rename(std::string_view name) override;
size_t GetOffset() const; size_t GetOffset() const;

57
src/core/file_sys/vfs_real.cpp
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@ -72,12 +72,15 @@ size_t RealVfsFile::Write(const u8* data, size_t length, size_t offset) {
return backing.WriteBytes(data, length); return backing.WriteBytes(data, length);
} }
bool RealVfsFile::Rename(const std::string& name) { bool RealVfsFile::Rename(std::string_view name) {
const auto out = FileUtil::Rename(GetName(), name); std::string name_str(name.begin(), name.end());
path = parent_path + DIR_SEP + name; const auto out = FileUtil::Rename(GetName(), name_str);
path = (parent_path + DIR_SEP).append(name);
path_components = parent_components; path_components = parent_components;
path_components.push_back(name); path_components.push_back(std::move(name_str));
backing = FileUtil::IOFile(path, PermissionsToCharArray(perms).c_str()); backing = FileUtil::IOFile(path, PermissionsToCharArray(perms).c_str());
return out; return out;
} }
@ -135,36 +138,54 @@ std::shared_ptr<VfsDirectory> RealVfsDirectory::GetParentDirectory() const {
return std::make_shared<RealVfsDirectory>(parent_path, perms); return std::make_shared<RealVfsDirectory>(parent_path, perms);
} }
std::shared_ptr<VfsDirectory> RealVfsDirectory::CreateSubdirectory(const std::string& name) { std::shared_ptr<VfsDirectory> RealVfsDirectory::CreateSubdirectory(std::string_view name) {
if (!FileUtil::CreateDir(path + DIR_SEP + name)) const std::string subdir_path = (path + DIR_SEP).append(name);
if (!FileUtil::CreateDir(subdir_path)) {
return nullptr; return nullptr;
subdirectories.emplace_back(std::make_shared<RealVfsDirectory>(path + DIR_SEP + name, perms)); }
subdirectories.emplace_back(std::make_shared<RealVfsDirectory>(subdir_path, perms));
return subdirectories.back(); return subdirectories.back();
} }
std::shared_ptr<VfsFile> RealVfsDirectory::CreateFile(const std::string& name) { std::shared_ptr<VfsFile> RealVfsDirectory::CreateFile(std::string_view name) {
if (!FileUtil::CreateEmptyFile(path + DIR_SEP + name)) const std::string file_path = (path + DIR_SEP).append(name);
if (!FileUtil::CreateEmptyFile(file_path)) {
return nullptr; return nullptr;
files.emplace_back(std::make_shared<RealVfsFile>(path + DIR_SEP + name, perms)); }
files.emplace_back(std::make_shared<RealVfsFile>(file_path, perms));
return files.back(); return files.back();
} }
bool RealVfsDirectory::DeleteSubdirectory(const std::string& name) { bool RealVfsDirectory::DeleteSubdirectory(std::string_view name) {
return FileUtil::DeleteDirRecursively(path + DIR_SEP + name); const std::string subdir_path = (path + DIR_SEP).append(name);
return FileUtil::DeleteDirRecursively(subdir_path);
} }
bool RealVfsDirectory::DeleteFile(const std::string& name) { bool RealVfsDirectory::DeleteFile(std::string_view name) {
auto file = GetFile(name); const auto file = GetFile(name);
if (file == nullptr)
if (file == nullptr) {
return false; return false;
}
files.erase(std::find(files.begin(), files.end(), file)); files.erase(std::find(files.begin(), files.end(), file));
auto real_file = std::static_pointer_cast<RealVfsFile>(file); auto real_file = std::static_pointer_cast<RealVfsFile>(file);
real_file->Close(); real_file->Close();
return FileUtil::Delete(path + DIR_SEP + name);
const std::string file_path = (path + DIR_SEP).append(name);
return FileUtil::Delete(file_path);
} }
bool RealVfsDirectory::Rename(const std::string& name) { bool RealVfsDirectory::Rename(std::string_view name) {
return FileUtil::Rename(path, parent_path + DIR_SEP + name); const std::string new_name = (parent_path + DIR_SEP).append(name);
return FileUtil::Rename(path, new_name);
} }
bool RealVfsDirectory::ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) { bool RealVfsDirectory::ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) {

14
src/core/file_sys/vfs_real.h
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@ -4,6 +4,8 @@
#pragma once #pragma once
#include <string_view>
#include "common/file_util.h" #include "common/file_util.h"
#include "core/file_sys/mode.h" #include "core/file_sys/mode.h"
#include "core/file_sys/vfs.h" #include "core/file_sys/vfs.h"
@ -24,7 +26,7 @@ struct RealVfsFile : public VfsFile {
bool IsReadable() const override; bool IsReadable() const override;
size_t Read(u8* data, size_t length, size_t offset) const override; size_t Read(u8* data, size_t length, size_t offset) const override;
size_t Write(const u8* data, size_t length, size_t offset) override; size_t Write(const u8* data, size_t length, size_t offset) override;
bool Rename(const std::string& name) override; bool Rename(std::string_view name) override;
private: private:
bool Close(); bool Close();
@ -47,11 +49,11 @@ struct RealVfsDirectory : public VfsDirectory {
bool IsReadable() const override; bool IsReadable() const override;
std::string GetName() const override; std::string GetName() const override;
std::shared_ptr<VfsDirectory> GetParentDirectory() const override; std::shared_ptr<VfsDirectory> GetParentDirectory() const override;
std::shared_ptr<VfsDirectory> CreateSubdirectory(const std::string& name) override; std::shared_ptr<VfsDirectory> CreateSubdirectory(std::string_view name) override;
std::shared_ptr<VfsFile> CreateFile(const std::string& name) override; std::shared_ptr<VfsFile> CreateFile(std::string_view name) override;
bool DeleteSubdirectory(const std::string& name) override; bool DeleteSubdirectory(std::string_view name) override;
bool DeleteFile(const std::string& name) override; bool DeleteFile(std::string_view name) override;
bool Rename(const std::string& name) override; bool Rename(std::string_view name) override;
protected: protected:
bool ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) override; bool ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) override;

2
src/core/hle/service/filesystem/filesystem.cpp
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@ -24,7 +24,7 @@ namespace Service::FileSystem {
constexpr u64 EMULATED_SD_REPORTED_SIZE = 32000000000; constexpr u64 EMULATED_SD_REPORTED_SIZE = 32000000000;
static FileSys::VirtualDir GetDirectoryRelativeWrapped(FileSys::VirtualDir base, static FileSys::VirtualDir GetDirectoryRelativeWrapped(FileSys::VirtualDir base,
const std::string& dir_name) { std::string_view dir_name) {
if (dir_name.empty() || dir_name == "." || dir_name == "/" || dir_name == "\\") if (dir_name.empty() || dir_name == "." || dir_name == "/" || dir_name == "\\")
return base; return base;

3
src/core/loader/loader.cpp
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@ -49,7 +49,8 @@ FileType GuessFromFilename(const std::string& name) {
if (name == "main") if (name == "main")
return FileType::DeconstructedRomDirectory; return FileType::DeconstructedRomDirectory;
const std::string extension = Common::ToLower(FileUtil::GetExtensionFromFilename(name)); const std::string extension =
Common::ToLower(std::string(FileUtil::GetExtensionFromFilename(name)));
if (extension == "elf") if (extension == "elf")
return FileType::ELF; return FileType::ELF;